Question 1

Is Marlborough Water Works water safe to drink?

Accepted Answer

Marlborough Water Works (PWS ID: NH1481010) has 245 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. EPA SDWIS lists this system's service population as 750 people using Groundwater sources.

Question 2

How many people does Marlborough Water Works serve?

Accepted Answer

EPA SDWIS reports that Marlborough Water Works serves 750 people (this public water system's service population, not the municipal population of Marlborough or any other city). It is a Local-owned system using Groundwater water sources with 300 service connections. The operator address is listed in Marlborough, New Hampshire.

Question 3

What type of violations does Marlborough Water Works have?

Accepted Answer

Marlborough Water Works has 245 total violations: 18 health-based violations (MCL exceedances or treatment failures), 223 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.

Question 4

Has PFAS been detected in Marlborough Water Works water?

Accepted Answer

No PFAS testing data is available for Marlborough Water Works under the EPA's UCMR5 monitoring program.

Question 5

What water source does Marlborough Water Works use?

Accepted Answer

Marlborough Water Works uses Groundwater as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.

Question 6

Where does this data come from?

Accepted Answer

All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.

Question 7

Where does Marlborough Water Works sit among U.S. public water systems?

Accepted Answer

According to EPA SDWIS population_served among sitemap-advertised systems (serving 500+), Marlborough Water Works ranks #23,448 of 29,740 by people served, and #176 of 284 in New Hampshire. Ordinals use population_served DESC among systems serving 500+ (the sitemap cohort). See /methodology#corpus-placement.

Question 8

How does Marlborough Water Works's violation count compare nationally?

Accepted Answer

Marlborough Water Works has 245 recorded EPA SDWIS violations, fewer than 12% of the 29,740 public water systems serving 500 or more people nationwide (the same sitemap cohort used for the corpus-placement ranking above). 88% of that cohort has fewer violations than Marlborough Water Works. A system can have zero recorded violations and still be actively monitored, and a high violation count often reflects a system that reports thoroughly, not necessarily one with worse water.

Contaminant	Category	Count	Latest
Coliform (TCR)	MCL	18	2010
Coliform (TCR)	MR	13	1993
1,2,4-Trichlorobenzene	MR	10	1995
cis-1,2-Dichloroethylene	MR	10	1995
Xylenes, Total	MR	10	1995
DICHLOROMETHANE	MR	10	1995
o-Dichlorobenzene	MR	10	1995
Vinyl chloride	MR	10	1995
1,1-Dichloroethylene	MR	10	1995
trans-1,2-Dichloroethylene	MR	10	1995
1,2-Dichloroethane	MR	10	1995
1,1,1-Trichloroethane	MR	10	1995
Carbon tetrachloride	MR	10	1995
1,2-Dichloropropane	MR	10	1995
1,1,2-Trichloroethane	MR	10	1995
Tetrachloroethylene	MR	10	1995
CHLOROBENZENE	MR	10	1995
Benzene	MR	10	1995
Toluene	MR	10	1995
Ethylbenzene	MR	10	1995
Styrene	MR	10	1995
p-Dichlorobenzene	MR	10	1995
Trichloroethylene	MR	10	1995
Consumer Confidence Rule	Other	2	2010

Marlborough Water Works

Marlborough Water Works standing, high SDWIS violation third

System Details

Violation History

Violation Count vs. the National Corpus

Population served record for Marlborough Water Works

Nationwide peers

Cross-state systems with comparable violation load

Cross-state systems with smaller service footprints